==================================================================
BUG: KASAN: slab-use-after-free in __hlist_del include/linux/list.h:901 [inline]
BUG: KASAN: slab-use-after-free in detach_timer kernel/time/timer.c:880 [inline]
BUG: KASAN: slab-use-after-free in expire_timers+0x476/0x4b0 kernel/time/timer.c:1734
Write of size 8 at addr ffff88804141d500 by task udevd/1451
CPU: 1 PID: 1451 Comm: udevd Not tainted 6.3.0-syzkaller-04626-g0cfd8703e7da #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319
print_report mm/kasan/report.c:430 [inline]
kasan_report+0x11c/0x130 mm/kasan/report.c:536
__hlist_del include/linux/list.h:901 [inline]
detach_timer kernel/time/timer.c:880 [inline]
expire_timers+0x476/0x4b0 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:2022 [inline]
__run_timers kernel/time/timer.c:1995 [inline]
run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
__do_softirq+0x1d4/0x905 kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x114/0x190 kernel/softirq.c:650
irq_exit_rcu+0x9/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:finish_task_switch.isra.0+0x2bf/0xc80 kernel/sched/core.c:5186
Code: 8b 3a 4c 89 e7 48 c7 02 00 00 00 00 ff d1 4d 85 ff 75 bf 4c 89 e7 e8 60 f8 ff ff e8 bb ca 31 00 fb 65 48 8b 1c 25 00 b9 03 00 <48> 8d bb e0 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc900002ff9d8 EFLAGS: 00000202
RAX: 0000000000002b0d RBX: ffff8880405cc100 RCX: 1ffffffff22a1e2e
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900002ffa20 R08: 0000000000000001 R09: ffffffff914cbc77
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880b993c300
R13: ffff888074dc4180 R14: 0000000000000000 R15: ffff8880b993cd38
context_switch kernel/sched/core.c:5310 [inline]
__schedule+0xc99/0x5770 kernel/sched/core.c:6625
preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:6937
irqentry_exit+0x35/0x80 kernel/entry/common.c:433
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:650
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x8/0x20 kernel/kcov.c:290
Code: 00 00 f3 0f 1e fa 48 8b 0c 24 48 89 f2 48 89 fe bf 06 00 00 00 e9 f8 fe ff ff 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 8b 0c 24 <40> 0f b6 d6 40 0f b6 f7 bf 01 00 00 00 e9 d6 fe ff ff 66 0f 1f 44
RSP: 0018:ffffc900002ffc88 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff81f60245
RDX: ffff88807d2c6d30 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff88807e008860 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000019 R11: 0000000000000000 R12: ffff88807e008858
R13: ffff88807d2c6d30 R14: ffff88807e008840 R15: dffffc0000000000
__list_add include/linux/list.h:69 [inline]
list_add_tail include/linux/list.h:102 [inline]
ep_send_events fs/eventpoll.c:1721 [inline]
ep_poll fs/eventpoll.c:1823 [inline]
do_epoll_wait+0xbf5/0x1980 fs/eventpoll.c:2271
__do_sys_epoll_wait fs/eventpoll.c:2283 [inline]
__se_sys_epoll_wait fs/eventpoll.c:2278 [inline]
__x64_sys_epoll_wait+0x15c/0x280 fs/eventpoll.c:2278
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb58d362457
Code: 73 01 c3 48 8b 0d d1 d9 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 e8 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 76 48 8b 15 a2 d9 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff0cd6fba8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb58d362457
RDX: 0000000000000004 RSI: 00007fff0cd6fbe8 RDI: 0000000000000004
RBP: 0000563978ce90c0 R08: 0000000000000007 R09: e93dd89f2c923897
R10: 00000000ffffffff R11: 0000000000000246 R12: 0000563978ce89b0
R13: 00007fff0cd6fbe8 R14: 0000000000000008 R15: 0000563978ca52c0
Allocated by task 28730:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
____kasan_kmalloc mm/kasan/common.c:333 [inline]
__kasan_kmalloc+0xa3/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:196 [inline]
__do_kmalloc_node mm/slab_common.c:966 [inline]
__kmalloc_node+0x61/0x1a0 mm/slab_common.c:973
kmalloc_node include/linux/slab.h:580 [inline]
kvmalloc_node+0x76/0x1a0 mm/util.c:603
kvmalloc include/linux/slab.h:698 [inline]
kvzalloc include/linux/slab.h:706 [inline]
alloc_netdev_mqs+0x9c/0x1250 net/core/dev.c:10588
rtnl_create_link+0xbeb/0xee0 net/core/rtnetlink.c:3312
rtnl_newlink_create net/core/rtnetlink.c:3430 [inline]
__rtnl_newlink+0xfd4/0x1840 net/core/rtnetlink.c:3657
rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3670
rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6181
netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2577
netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1942
sock_sendmsg_nosec net/socket.c:724 [inline]
sock_sendmsg+0xde/0x190 net/socket.c:747
__sys_sendto+0x23a/0x340 net/socket.c:2142
__do_sys_sendto net/socket.c:2154 [inline]
__se_sys_sendto net/socket.c:2150 [inline]
__x64_sys_sendto+0xe1/0x1b0 net/socket.c:2150
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Freed by task 13962:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:521
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x13b/0x1a0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:162 [inline]
__cache_free mm/slab.c:3390 [inline]
__do_kmem_cache_free mm/slab.c:3577 [inline]
__kmem_cache_free+0xcd/0x2c0 mm/slab.c:3584
kvfree+0x46/0x50 mm/util.c:649
device_release+0xa3/0x240 drivers/base/core.c:2436
kobject_cleanup lib/kobject.c:681 [inline]
kobject_release lib/kobject.c:712 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1c2/0x4d0 lib/kobject.c:729
netdev_run_todo+0x762/0x1100 net/core/dev.c:10362
default_device_exit_batch+0x456/0x5b0 net/core/dev.c:11354
ops_exit_list+0x125/0x170 net/core/net_namespace.c:175
cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:614
process_one_work+0x991/0x15c0 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x33e/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Last potentially related work creation:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0x7b/0x90 mm/kasan/generic.c:491
insert_work+0x48/0x350 kernel/workqueue.c:1361
__queue_work+0x625/0x1120 kernel/workqueue.c:1524
call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
expire_timers+0xbc/0x4b0 kernel/time/timer.c:1746
__run_timers kernel/time/timer.c:2022 [inline]
__run_timers kernel/time/timer.c:1995 [inline]
run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
__do_softirq+0x1d4/0x905 kernel/softirq.c:571
Second to last potentially related work creation:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0x7b/0x90 mm/kasan/generic.c:491
insert_work+0x48/0x350 kernel/workqueue.c:1361
__queue_work+0x625/0x1120 kernel/workqueue.c:1524
call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
expire_timers+0xbc/0x4b0 kernel/time/timer.c:1746
__run_timers kernel/time/timer.c:2022 [inline]
__run_timers kernel/time/timer.c:1995 [inline]
run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
__do_softirq+0x1d4/0x905 kernel/softirq.c:571
The buggy address belongs to the object at ffff88804141c000
which belongs to the cache kmalloc-cg-8k of size 8192
The buggy address is located 5376 bytes inside of
freed 8192-byte region [ffff88804141c000, ffff88804141e000)
The buggy address belongs to the physical page:
page:ffffea0001050700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4141c
head:ffffea0001050700 order:2 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88801df88f81
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffff88801244db00 ffffea0000d40610 ffffea0000bb1e10
raw: 0000000000000000 ffff88804141c000 0000000100000001 ffff88801df88f81
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x3460c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 28730, tgid 28730 (syz-executor.5), ts 2575171990625, free_ts 2573269858926
prep_new_page mm/page_alloc.c:2553 [inline]
get_page_from_freelist+0x1190/0x2e20 mm/page_alloc.c:4326
__alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:5592
__alloc_pages_node include/linux/gfp.h:237 [inline]
kmem_getpages mm/slab.c:1360 [inline]
cache_grow_begin+0x9b/0x3b0 mm/slab.c:2570
cache_alloc_refill+0x27f/0x380 mm/slab.c:2943
____cache_alloc mm/slab.c:3019 [inline]
____cache_alloc mm/slab.c:3002 [inline]
__do_cache_alloc mm/slab.c:3202 [inline]
slab_alloc_node mm/slab.c:3250 [inline]
__kmem_cache_alloc_node+0x360/0x3f0 mm/slab.c:3541
__do_kmalloc_node mm/slab_common.c:965 [inline]
__kmalloc_node+0x51/0x1a0 mm/slab_common.c:973
kmalloc_node include/linux/slab.h:580 [inline]
kvmalloc_node+0x76/0x1a0 mm/util.c:603
kvmalloc include/linux/slab.h:698 [inline]
kvzalloc include/linux/slab.h:706 [inline]
alloc_netdev_mqs+0x9c/0x1250 net/core/dev.c:10588
rtnl_create_link+0xbeb/0xee0 net/core/rtnetlink.c:3312
rtnl_newlink_create net/core/rtnetlink.c:3430 [inline]
__rtnl_newlink+0xfd4/0x1840 net/core/rtnetlink.c:3657
rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3670
rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6181
netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2577
netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1942
sock_sendmsg_nosec net/socket.c:724 [inline]
sock_sendmsg+0xde/0x190 net/socket.c:747
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1454 [inline]
free_pcp_prepare+0x5d5/0xa50 mm/page_alloc.c:1504
free_unref_page_prepare mm/page_alloc.c:3388 [inline]
free_unref_page+0x1d/0x490 mm/page_alloc.c:3483
slab_destroy mm/slab.c:1613 [inline]
slabs_destroy+0x85/0xc0 mm/slab.c:1633
cache_flusharray mm/slab.c:3361 [inline]
___cache_free+0x2ae/0x3d0 mm/slab.c:3424
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x4f/0x1a0 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:186 [inline]
slab_post_alloc_hook mm/slab.h:710 [inline]
slab_alloc_node mm/slab.c:3257 [inline]
slab_alloc mm/slab.c:3266 [inline]
__kmem_cache_alloc_lru mm/slab.c:3443 [inline]
kmem_cache_alloc+0x1bd/0x3f0 mm/slab.c:3452
mt_alloc_one lib/maple_tree.c:159 [inline]
mas_alloc_nodes+0x4dd/0x880 lib/maple_tree.c:1287
mas_node_count_gfp lib/maple_tree.c:1367 [inline]
mas_preallocate+0x1bb/0x360 lib/maple_tree.c:5806
vma_iter_prealloc mm/internal.h:972 [inline]
mmap_region+0x85c/0x2620 mm/mmap.c:2671
do_mmap+0x831/0xf60 mm/mmap.c:1364
vm_mmap_pgoff+0x1af/0x280 mm/util.c:542
ksys_mmap_pgoff+0x7d/0x5a0 mm/mmap.c:1410
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Memory state around the buggy address:
ffff88804141d400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88804141d480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88804141d500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88804141d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88804141d600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 8b 3a mov (%rdx),%edi
2: 4c 89 e7 mov %r12,%rdi
5: 48 c7 02 00 00 00 00 movq $0x0,(%rdx)
c: ff d1 callq *%rcx
e: 4d 85 ff test %r15,%r15
11: 75 bf jne 0xffffffd2
13: 4c 89 e7 mov %r12,%rdi
16: e8 60 f8 ff ff callq 0xfffff87b
1b: e8 bb ca 31 00 callq 0x31cadb
20: fb sti
21: 65 48 8b 1c 25 00 b9 mov %gs:0x3b900,%rbx
28: 03 00
* 2a: 48 8d bb e0 15 00 00 lea 0x15e0(%rbx),%rdi <-- trapping instruction
31: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
38: fc ff df
3b: 48 89 fa mov %rdi,%rdx
3e: 48 rex.W
3f: c1 .byte 0xc1